Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in corrosion resisting steel - Diameter series 8 and 9, reduced internal radial clearance - Dimensions and loads

This standard specifies the characteristics of rigid single row ball bearings, in corrosion resisting steel, reduced internal radial clearance, diameter series 8 and 9  ), designed to withstand only slow rotations and oscillations under load.
They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms.
They are intended to be used in the temperature range: - 54 °C to 150 °C.
However, being lubricated with the following greases:
   very high pressure grease, ester type (code A), operational range - 73 °C to 121 °C or   very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range - 54 °C to 177 °C (see EN 3280),
their field of application when lubricated with code A grease is limited to 121 °C.

Luft- und Raumfahrt - Flugwerklager - Einreihige Rillenkugellager aus korrosionsbeständigem Stahl - Durchmesserreihen 8 und 9, reduzierte radiale Lagerluft - Maße und Belastungen

Diese Norm legt die Eigenschaften von einreihigen Rillenkugellagern aus korrosionsbeständigem Stahl mit reduzierter radialer Lagerluft, Durchmesserreihen 8 und 9 ) fest, die so ausgelegt sind, dass sie unter Belastung nur lang¬samen Dreh- und Schwenkbewegungen standhalten.
Sie sind zur Verwendung zwischen starren und beweglichen Flugwerkteilen und deren Betätigungseinrichtun¬gen bestimmt.
Sie sind für den Einsatz im Temperaturbereich von -54° C bis 150° C bestimmt.
Da sie jedoch mit folgenden Fetten geschmiert werden:
   Hochdruckfett auf Esterbasis (Kennbuchstabe A), Betriebstemperaturbereich -73° C bis 121° C oder
   Hochdruckfett auf der Basis von synthetischen Kohlenwasserstoffen zur allgemeinen Verwendung (Kenn¬buchstabe B), Betriebstemperaturbereich -54° C bis 177° C (siehe EN 3280),
ist ihr Anwendungsbereich bei Schmierung mit Fett mit dem Kennbuchstaben A auf 121° C eingeschränkt.

Série aérospatiale - Roulements pour structures d'aéronefs - Roulements en acier résistant à la corrosion, rigides à une rangée de billes - Séries de diamètres 8 et 9, jeu radial réduit - Dimensions et charges

Aeronavtika - Kotalni ležaji za letala - Enoredni žlebasti kroglični ležaji iz korozijsko odpornega jekla - Serija s premeroma 8 in 9, z zmanjšanim radialnim ohlapom ležaja - Mere in nosilnosti

General Information

Status
Published
Publication Date
14-May-2009
ICS
49.035 - Components for aerospace construction
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
15-Apr-2009
Due Date
20-Jun-2009
Completion Date
15-May-2009
Ref Project
EN 4033:2007 - Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in corrosion resisting steel - Diameter series 8 and 9, reduced internal radial clearance - Dimensions and loads

Overview

SIST EN 4033:2009 is a European aerospace standard published by CEN that specifies the dimensions, loads, and characteristics of rigid single row ball bearings used in airframe rolling applications. These bearings are made of corrosion resisting steel and belong to diameter series 8 and 9 with reduced internal radial clearance. Designed specifically for slow rotations and oscillations under load, the bearings are intended for installation between fixed and moving parts of an aircraft’s structural and control mechanisms. They operate effectively within a temperature range of –54 °C to 150 °C depending on the lubricant used, ensuring durability and reliability in demanding aerospace environments.

Key Topics

Bearing Characteristics

  • Type: Rigid single row ball bearings
  • Material: Corrosion resisting steel grades EN 2030 or EN 2226, hardened to ≥58 HRC
  • Diameter Series: 8 and 9
  • Internal Clearance: Reduced radial clearance to improve precision
  • Temperature Range: −54 °C to 150 °C (dependent on grease lubrication)

Lubrication Requirements

  • Grease Type A: Very high pressure ester type (operational range −73 °C to 121 °C)
  • Grease Type B: Very high pressure synthetic hydrocarbons, general purpose (operational range −54 °C to 177 °C)
  • Lubrication impacts the allowable temperature for bearing operation

Design & Load Specifications

  • Bearings designed for slow rotational or oscillatory movement under load
  • Permissible static axial and radial loads detailed for various diameter codes
  • Maximum starting torques and runout tolerances defined for consistency and performance
  • Surface roughness and treatment requirements ensure smooth operation and corrosion resistance

Marking and Identification

  • Standardized marking per EN 2424 Style A for traceability
  • Designation codes specify grease type, diameter, sealing, and surface treatments
  • Shields or seals are optional and affect bearing application details

Applications

SIST EN 4033:2009 bearings are crucial components in aerospace engineering where reliability, precision, and corrosion resistance are mandatory. Their specific design and construction make them ideal for:

  • Airframe structures requiring reliable rolling elements between fixed and moving parts
  • Aircraft control mechanisms where slow rotational or oscillating motions occur under load
  • Environments exposed to temperature extremes and corrosive elements typical in aerospace use
  • Applications requiring compliance with stringent aerospace component standards to ensure safety and performance

These bearings support the longevity and functional integrity of aircraft systems, contributing to overall safety and operational efficiency.

Related Standards

SIST EN 4033:2009 references and aligns with several other important aerospace and bearing standards including:

  • EN 3280: Aerospace series - Bearings, airframe rolling - Technical specifications
  • ISO 15: Rolling bearings - Boundary dimensions, general plan
  • ISO 1132-1: Rolling bearings - Tolerances - Terms and definitions
  • ISO 8075: Aerospace - Surface treatment of hardenable stainless steel parts
  • EN 2030 & EN 2226: Aerospace series - Hardened and tempered steel specifications used for bearing components
  • EN 2424: Aerospace series - Marking of aerospace products

Compliance with EN 4033 ensures cohesion with overarching aerospace quality and safety regulations, facilitating global standardization across the aerospace industry.

By adhering to SIST EN 4033:2009, manufacturers and engineers can guarantee high-performance rigid single row ball bearings that meet the demanding requirements of aerospace airframe rolling applications, optimizing safety, durability, and operational efficacy.

Frequently Asked Questions

SIST EN 4033:2009 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Bearings, airframe rolling - Rigid single row ball bearings in corrosion resisting steel - Diameter series 8 and 9, reduced internal radial clearance - Dimensions and loads". This standard covers: This standard specifies the characteristics of rigid single row ball bearings, in corrosion resisting steel, reduced internal radial clearance, diameter series 8 and 9 ), designed to withstand only slow rotations and oscillations under load. They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms. They are intended to be used in the temperature range: - 54 °C to 150 °C. However, being lubricated with the following greases: very high pressure grease, ester type (code A), operational range - 73 °C to 121 °C or very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range - 54 °C to 177 °C (see EN 3280), their field of application when lubricated with code A grease is limited to 121 °C.

This standard specifies the characteristics of rigid single row ball bearings, in corrosion resisting steel, reduced internal radial clearance, diameter series 8 and 9 ), designed to withstand only slow rotations and oscillations under load. They are intended for use between fixed and moving parts of the aircraft structure and their control mechanisms. They are intended to be used in the temperature range: - 54 °C to 150 °C. However, being lubricated with the following greases: very high pressure grease, ester type (code A), operational range - 73 °C to 121 °C or very high pressure grease, synthetic hydrocarbons, general purpose (code B), operational range - 54 °C to 177 °C (see EN 3280), their field of application when lubricated with code A grease is limited to 121 °C.

SIST EN 4033:2009 is classified under the following ICS (International Classification for Standards) categories: 49.035 - Components for aerospace construction. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 4033:2009 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Flugwerklager - Einreihige Rillenkugellager aus korrosionsbeständigem Stahl - Durchmesserreihen 8 und 9, reduzierte radiale Lagerluft - Maße und BelastungenSérie aérospatiale - Roulements pour structures d'aéronefs - Roulements en acier résistant à la corrosion, rigides à une rangée de billes - Séries de diamètres 8 et 9, jeu radial réduit - Dimensions et chargesAerospace series - Bearings, airframe rolling - Rigid single row ball bearings in corrosion resisting steel - Diameter series 8 and 9, reduced internal radial clearance - Dimensions and loads49.035Sestavni deli za letalsko in vesoljsko gradnjoComponents for aerospace constructionICS:Ta slovenski standard je istoveten z:EN 4033:2007SIST EN 4033:2009en,de01-julij-2009SIST EN 4033:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 4033June 2007ICS 49.035 English VersionAerospace series - Bearings, airframe rolling - Rigid single rowball bearings in corrosion resisting steel - Diameter series 8 and9, reduced internal radial clearance - Dimensions and loadsSérie aérospatiale - Roulements pour structures d'aéronefs- Roulements en acier résistant à la corrosion, rigides à unerangée de billes - Séries de diamètres 8 et 9, jeu radialréduit - Dimensions et chargesLuft- und Raumfahrt - Flugwerklager - EinreihigeRillenkugellager aus korrosionsbeständigem Stahl -Durchmesserreihen 8 und 9, reduzierte radiale Lagerluft -Maße und BelastungenThis European Standard was approved by CEN on 16 March 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 4033:2007: ESIST EN 4033:2009
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